Members of the Teamsters union have authorized a strike against Costco on February 1 unless they reach a deal with the warehouse retailer before the current contract expires 31.

About 18,000 Costco workers will go on strike beginning Feb. 1 if their union doesn’t reach a deal with the warehouse retailer, the union announced Sunday. The Teamsters represent Costco workers in 56 warehouses across five states,

Thousands of Costco workers are gearing up to walk the picket lines. Over 18,000 union workers voted to authorize a strike when their current contract expires on Jan. 31. The workers are asking for better wages and benefits.